On Thu, May 06, 2010 at 04:09:39PM +0300, Baruch Siach wrote:
> This is the soc_camera support developed by Sascha Hauer for the i.MX27. Alan
> Carvalho de Assis modified the original driver to get it working on more
> recent
> kernels. I modified it further to add support for i.MX25. This driver has only
> been tested on the i.MX25 platform.
>
> Signed-off-by: Baruch Siach <bar...@tkos.co.il>
> ---
> arch/arm/plat-mxc/include/mach/memory.h | 4 +-
> arch/arm/plat-mxc/include/mach/mx2_cam.h | 41 +
> drivers/media/video/Kconfig | 14 +
> drivers/media/video/Makefile | 1 +
> drivers/media/video/mx2_camera.c | 1396
> ++++++++++++++++++++++++++++++
> 5 files changed, 1454 insertions(+), 2 deletions(-)
> create mode 100644 arch/arm/plat-mxc/include/mach/mx2_cam.h
> create mode 100644 drivers/media/video/mx2_camera.c
>
On i.MX27 in DMA mode you pass the kernel virtual address to the DMA
engine. Should be a physical address, so please amend the following:
>From 8a1e1ac8b2448a5c83ed933e427cccd00d470308 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.ha...@pengutronix.de>
Date: Fri, 21 May 2010 09:15:22 +0200
Subject: [PATCH 2/2] mx2_camera: pass physical address to DMA engine
Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>
---
drivers/media/video/mx2_camera.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
index 5d6fb08..6436968 100644
--- a/drivers/media/video/mx2_camera.c
+++ b/drivers/media/video/mx2_camera.c
@@ -216,6 +216,7 @@ struct mx2_camera_dev {
unsigned int irq_csi, irq_emma;
void __iomem *base_csi, *base_emma;
+ unsigned long base_dma;
struct mx2_camera_platform_data *pdata;
struct resource *res_csi, *res_emma;
@@ -550,7 +551,7 @@ static void mx2_videobuf_queue(struct videobuf_queue *vq,
if (!pcdev->active) {
ret = imx_dma_setup_single(pcdev->dma,
videobuf_to_dma_contig(vb), vb->size,
- (u32)pcdev->base_csi + 0x10,
+ (u32)pcdev->base_dma + 0x10,
DMA_MODE_READ);
if (ret) {
vb->state = VIDEOBUF_ERROR;
@@ -976,7 +977,8 @@ static void mx27_camera_frame_done(struct mx2_camera_dev
*pcdev, int state)
vb->state = VIDEOBUF_ACTIVE;
ret = imx_dma_setup_single(pcdev->dma, videobuf_to_dma_contig(vb),
- vb->size, (u32)pcdev->base_csi + 0x10, DMA_MODE_READ);
+ vb->size, (u32)pcdev->base_dma + 0x10, DMA_MODE_READ);
+
if (ret) {
vb->state = VIDEOBUF_ERROR;
wake_up(&vb->done);
@@ -1273,6 +1275,7 @@ static int mx2_camera_probe(struct platform_device *pdev)
}
pcdev->irq_csi = irq_csi;
pcdev->base_csi = base_csi;
+ pcdev->base_dma = res_csi->start;
pcdev->dev = &pdev->dev;
err = request_irq(pcdev->irq_csi, mx2_cam_irq_handler, 0,
--
1.7.0
--
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